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BeagleBone Black boot information
Is there an MLO for the BeagleBone Black yet which can load a kernel from
ffs? I'm using MLO and u-boot.img from this page:
Why is the kernel compiled with:
load addr: 0x80300000
entry point: 0x80300000
yet when I try to load and boot the kernel there, it fails:
U-Boot# fatload mmc 0:1 80300000 netbsd.ub
2998016 bytes read in 344 ms (8.3 MiB/s)
U-Boot# bootm 80300000
## Booting kernel from Legacy Image at 80300000 ...
Image Name: NetBSD/beagle 6.99.23
Image Type: ARM NetBSD Kernel Image (uncompressed)
Data Size: 2997952 Bytes = 2.9 MiB
Load Address: 80300000
Entry Point: 80300000
Verifying Checksum ... OK
XIP Kernel Image ... OK
## Transferring control to NetBSD stage-2 loader (at address 80300000) ...
MAYBE you should read doc/README.arm-unaligned-accesses
pc : [<80300008>] lr : [<9f35b654>]
sp : 9f238db0 ip : 0000000f fp : 9f239818
r10: 9f3ad780 r9 : 00000002 r8 : 9f238f40
r7 : 00000000 r6 : 00000002 r5 : 9f3a1235 r4 : 80300000
r3 : 9f3a1235 r2 : 9f3a1235 r1 : 00000000 r0 : 9f238fe0
Flags: nZCv IRQs off FIQs on Mode SVC_32
Resetting CPU ...
When I load and run from 0x81000000, it works... So what's the relationship
between the NetBSD kernel's load address and entry point and u-boot's load
address and start address?
I'm trying to make sense of all of this because the GNU/Linux
documentation assumes the world is GNU/Linux and doesn't talk about the
BeagleBone except assuming that the OS is already booted, plus there is no
NetBSD documentation and the only mentions of NetBSD on BeagleBone Black
just say it boots, not how to set up a working system. I suppose a HOW-TO
is in order, which I'll do when I've gotten mine working.
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